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Finding the Fourth Proportional to 73,421.36, 101,320.80 and 39,887.36

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Solution

The fourth proportional to 73,421.36, 101,320.80 and 39,887.36 is: 55,044.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,421.36 : 101,320.80 = 39,887.36 : x
  2. Step 2: Convert to fraction form
    73,421.36/101,320.80 = 39,887.36/x
  3. Step 3: Cross multiply
    73,421.36x = 101,320.80 × 39,887.36
  4. Step 4: Simplify right side
    73,421.36x = 4,041,419,225.09
  5. Step 5: Solve for x
    x = 4,041,419,225.09/73,421.36
  6. Step 6: Final answer
    x = 55,044.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.